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/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2006 - 2009 Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.libraries.resourceloader.loader.zip;
import java.io.InputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
import org.pentaho.reporting.libraries.resourceloader.ResourceLoadingException;
import org.pentaho.reporting.libraries.resourceloader.ResourceData;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
import org.pentaho.reporting.libraries.resourceloader.loader.AbstractResourceData;
import org.pentaho.reporting.libraries.resourceloader.loader.LoaderUtils;
/**
* Creation-Date: 05.04.2006, 15:44:07
*
* @author Thomas Morgner
*/
public class ZipResourceData extends AbstractResourceData
{
private ResourceKey key;
private static final long serialVersionUID = -7432641415119820243L;
public ZipResourceData(final ResourceKey key)
{
if (key == null)
{
throw new NullPointerException();
}
this.key = key;
}
public InputStream getResourceAsStream(final ResourceManager caller) throws ResourceLoadingException
{
// again, this is going to hurt the performance.
final ResourceKey parentKey = key.getParent();
final ResourceData data = caller.load(parentKey);
final ZipInputStream zin = new ZipInputStream(data.getResourceAsStream(caller));
try
{
try
{
ZipEntry zipEntry = zin.getNextEntry();
while (zipEntry != null)
{
if (zipEntry.getName().equals(key.getIdentifier()) == false)
{
zipEntry = zin.getNextEntry();
continue;
}
// read from here ..
return zin;
}
}
finally
{
zin.close();
}
}
catch (IOException e)
{
throw new ResourceLoadingException
("Reading the zip-file failed.", e);
}
throw new ResourceLoadingException
("The zip-file did not contain the specified entry");
}
public Object getAttribute(final String key)
{
if (key.equals(ResourceData.FILENAME))
{
return LoaderUtils.getFileName((String) this.key.getIdentifier());
}
return null;
}
public ResourceKey getKey()
{
return key;
}
public long getVersion(final ResourceManager caller)
throws ResourceLoadingException
{
final ResourceKey parentKey = key.getParent();
final ResourceData data = caller.load(parentKey);
return data.getVersion(caller);
}
}
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